Bracket pulsar

From LifeWiki
Jump to navigation Jump to search
Bracket pulsar
x = 15, y = 15, rule = B3/S23 5bo3bo$5bo3bo$5bo3bo$4b2o3b2o$3bobo3bobo$5o5b5o4$5o5b5o$3bobo3bobo$4b 2o3b2o$5bo3bo$5bo3bo$5bo3bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ THUMBSIZE 2 GPS 2 ]]
Pattern type Oscillator
Number of cells 48
Bounding box 15 × 15
Period 3
Mod 3
Heat 53.3
Volatility 0.91
Strict volatility 0.91
Discovered by Hartmut Holzwart
Year of discovery 1993

Bracket pulsar[notes 1] is a period-3 oscillator discovered by Hartmut Holzwart on the 5th of March, 1993.[1] Despite being identical in population and bounding box to the pulsar, it is much rarer, having never appeared naturally so far. However, one in 21,000 odd-width eightfold symmetric soups (D8_1) form a bracket pulsar in the centre.

It is one of three notable extensible families of p3 oscillators with D8 symmetry, the others being the pulsar and the cross. Its next extension is the bracket quasar, named in analogy to the quasar.

Unlike the pulsar and cross families, the quadrants of the bracket pulsar are able to be skewed in relation to each other. For the pulsar case this permits three derivative oscillators, one with a single 2-cell shift, and two with an additional 2-cell shift:

x = 15, y = 17, rule = B3/S23 5bo$5bo$5bo3bo$4b2o3bo$3bobo3bo$5o4b2o$9bobo$10b5o2$5o$3bobo$4b2o4b5o$ 5bo3bobo$5bo3b2o$5bo3bo$9bo$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Single-skew
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagoluehere
x = 17, y = 17, rule = B3/S23 5bo$5bo$5bo3bo$4b2o3bo$3bobo3bo$5o4b2o$9bobo$10b5o2$2b5o$5bobo$6b2o4b 5o$7bo3bobo$7bo3b2o$7bo3bo$11bo$11bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Cis-skewed(?)
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagoluehere
x = 17, y = 17, rule = B3/S23 7bo$7bo$7bo3bo$6b2o3bo$5bobo3bo$2b5o4b2o$11bobo$12b5o2$5o$3bobo$4b2o4b 5o$5bo3bobo$5bo3b2o$5bo3bo$9bo$9bo! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]]
Trans-skewed(?)
(click above to open LifeViewer)
RLE: here Plaintext: here
Catagoluehere

Notes

  1. named as such on Catagolue; name added by Goucher in July 2021 https://gitlab.com/apgoucher/catagolue/-/commit/b2d236b90881bb0ce352f0f3b54f3d8b787790a0

References

  1. Dean Hickerson's oscillator stamp collection. Retrieved on 14 December 2021.

External links

  • 48P3.12 at Heinrich Koenig's Game of Life Object Catalogs